feat: persistent Ctrl+wheel zoom, saved award-column widths, F9 + hide-empty CW macros

- Zoom: our own Ctrl+wheel zoom (CSS zoom on the root, 50–250%), persisted in
  localStorage and restored at startup; Ctrl+0 resets. Replaces the non-persistent
  native WebView2 zoom. The freq-digit wheel now ignores Ctrl so it passes through
  to zoom.
- Award column widths: they were stripped from AG Grid's saved column state (that
  strip fixes a visibility desync) which also dropped their width. Now persisted
  separately per award code (localStorage + portable DB copy) and re-applied on
  rebuild/reopen.
- CW keyer widget: macros padded to 9 (F1–F9 slot) and empty macros hidden like
  the voice keyer, with the F-number kept tied to the real macro index so the
  F-key shortcuts still line up. New QRZ? default for F9.

frontend/src/components/WinkeyerPanel.tsx

@@ -230,9 +230,14 @@ export function WinkeyerPanel({
           {autoCall && <span className="text-[10px] text-warning/80">{t('wkp.loopHint')}</span>}
         </div>
 
-        {/* Macro buttons F1… — single-line (F-key + label) to keep the panel short. */}
+        {/* Macro buttons F1… — single-line (F-key + label) to keep the panel short.
+            Empty macros (no label AND no text) are hidden, like the voice keyer;
+            the F-number stays tied to the macro's real index so shortcuts match. */}
         <div className="grid grid-cols-3 gap-1">
-          {macros.map((m, i) => (
+          {macros
+            .map((m, i) => ({ m, i }))
+            .filter(({ m }) => `${m.label ?? ''}${m.text ?? ''}`.trim() !== '')
+            .map(({ m, i }) => (
             <button
               key={i}
               type="button"